Through precision tabletop models and numerical predictions from anistropic rod theory, we demonstrate that introducing radial creases to annular strips could significantly enrich their nonlinear mechanics by creating generic bistability and various folding patterns, depending on geometric parameters such as the overcurvature and the crease pattern. Folding of a large closed structure into smaller multiply covered loops is common in slender structures, such as rods/strips [1]}, [2]}, [3]}, curved folding [4]}, elastic rod networks [5]}, and ring origami [6]}. Different from previous results, we have demonstrated tunable looping patterns in creased annuli. Our numerical modeling is based on a continuous description of creases through a novel function \(\Delta \) , which captures the localized curvature at creases.
